I had the same thing, i cut the long stuff down with scissors, and got a yellow tang. I have said this before to others, but people are insistant that yellow tangs dont eat GHA, but ive had GHA and did the above remidy and now its gone....then my yellow tang got sick and died, my tank got swamped with GHA and so, I went to the LFS and picked up another, after a descent cleaning of the tank and now my tank is back to normal... I swear that yellow tang eat this stuff, I have witnessed the tang eating it, when ever there is any, and it eats it off of the rocks, snails, hermits, pretty much anywhere the GHA is, it just cant be super long, it has to be cut back and let the tang go to town, its free food for him, or so it seems. Hopefully this helps, it was just by chance that I found this remedy, as I too was worried about the state of my aquarium...I thought it was going to be the end... But my little yellow friend saved my aquarium twice.;D

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yea.. unfortunatly a yellow tang in my tank is not an option, i wouldnt put a yellow tang in my tiny 37g. thanks for the idea though maybe it would work for kc.

how about nuking each rock one by one? leaving a few weeks in between each nuke as to not cause a cycle.

I had a terrible GHA problem in my old tank until I realized that the R/O DI water I was buying from my local fish store was not any good. Their filters needed to be changed. I bought my own R/O DI unit and the GHA went away fairly quickly. I also added a phosphate reactor. I would suggest using a TDS meter on your R/O DI water to see if it is pure. You can pic that stuff daily and it won't do any good until you get to the root of the problem. You would not have GHA if the nutrients it needs were not present in your water for some reason.

I had a terrible GHA problem in my old tank until I realized that the R/O DI water I was buying from my local fish store was not any good. Their filters needed to be changed. I bought my own R/O DI unit and the GHA went away fairly quickly. I also added a phosphate reactor. I would suggest using a TDS meter on your R/O DI water to see if it is pure. You can pic that stuff daily and it won't do any good until you get to the root of the problem. You would not have GHA if the nutrients it needs were not present in your water for some reason.

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I set up my tank with RO/DI water from my own unit and only use that for water changes. I tested my water with a TDS meter and it read 0. I was hoping that was the problem so I could easily do something about it.

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